Sergeant

noun

1. UK army rank with NATO code OR-6, senior to corporal and junior to warrant officer ranks.
2. The highest rank of noncommissioned officer in some non-naval military forces and police.
3. A lawyer of the highest rank, equivalent to the doctor of civil law.
4. A title sometimes given to the servants of the sovereign.

   "sergeant surgeon, i.e. a servant, or attendant, surgeon"

5. A fish, the cobia.